This is the real point as far as I'm concerned - IPAs don't have roasted grains. If you use food-coloring to darken it, that would be, first a waste of time and dye, but then, yes, a BIPA. If you actually use roasted malts, how in the bleep is it an IPA? It'd be more accurate to call it a hoppy brown or a hoppy porter, or something like that. I think that taste, aroma and body are primary beer characteristics - color is whatever you get when you tune those to your preference. Would 7-up be Coke if you added caramel coloring?
Okay folks. This is really simple. Most people call it a Black IPA because the idea is to take a standard American IPA recipe and add enough roasted grains to make it black without being extremely roasty. That's it. Take an IPA, make it black = BLACK IPA!!
I'm no lover or advocate of this style, but in my mind, they are different from American Brown Ale, American Porters, and American Stouts.
A lot of IPAs aren't really pale, anyway. A lot of them lean more toward a heavy amber these days, if not flat out red. I don't hear anyone screaming about still referring to those as India Pale Ales.
Despite what the BJCP says, the commercial market will dictate what they are commonly called. The market seems to be going with Black IPA!